Method and apparatus for applying extruded profile and adjacent ribs to a traveling film web
CA 1287718 C · Owner: Trombley, James · Inventors: Zieke, Larry; Trombley, James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for applying a profile and adjacent ribs to a traveling film web to form a zipper-like closure. The device includes a first extrusion die for extruding a base member and a, pressure applying mechanism for joining the base member to the film web. A second extrusion die is provided for extruding a male profile member, a first rib member and a second rib member as three separate extrudates. The second extrusion die is designed to align the profile member, first rib member and second rib member on the film web such that the profile member is disposed between the first and second rib members.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 20, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 20, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.